That incident occurred near Maryland Drive and Kidder Avenue. The second call was about a fight at a South Auburn Street gas station, Bates said.

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Officers responded to each call and determined Franco had been in a fight with a woman at a home. Someone then drove him and the woman to the gas station, where the argument escalated, Bates said.

That's when the good Samaritan tried to intervene, the sergeant said.

"At that time the citizen was punched and knocked unconscious," Bates said. "He was all right. He declined medical aid at the scene."

According to the sergeant, Franco then drove away in the vehicle that had brought him to the gas station. Authorities issued a description of the car and officers found it, and Franco, in the 17000 block of Greenhorn Road.